Question

My 3.0 is fine at the moment but was thinking if I'd swap in the GM 3800 if the 3.0 ever died a horrible death. 3.0 was 425 lbs, 140 hp, 155 lbs-ft. torque, the 3800 is 204 hp, 235 lbs-ft torque. More everything with less weight. I know the 3.0 is a narrower 60 degree V while the 3800 is a wider 90 degree V. My A4LD is non-electronic except for the lockup torque converter. If this won't work, how about the Ford 3.8 from a Windstar with the dual intake runner system (taller intake) bolting up to the A4LD? I like the MPG and more power a bigger V6 offers and don't want a thirsty V8.

This kind of swap; regardless of which engine you use, will be VERY EXPENSIVE. The GM engines will not bolt in, and even if there is enough room in the engine compartment; you'll need custom motor mounts to support the engine, and a custom machined adapter plate for the motor to bolt to the transmission. You'll also need to adapt the vehicle wiring harness to the computer from the year and model engine you use (and it is illegal to install an older engine in an emission controlled vehicle) That alone will give you enough headaches to make it impractical. Even another Ford engine will require using the computer from the donor vehicle. And the exhaust system will have to be adapted to match the motor, exhaust manifolds, oxygen sensors, catalytic converter, etc.

However; the Ranger was available with an optional 4.0 liter OHV V-6 in 1993; and that motor was used through 2000. In 2001, the 4.0 V-6 was modernized and made into a SOHC motor; which was used through 2011. I'm sure that motor is lighter than the OHV motor; and it will have even more power. If you traded your truck in for a 2001 or newer Ranger with the 4.0 SOHC motor; you'd get al the benefits you're hoping for; without the hassles and cost of modifications. If you're curious about the fuel economy of those motors in different years; you can compare those figures at www.fueleconomy.gov/feg/download.shtml